Bioplastics - It's a better choice - English 1
approximately 70 per cent terephthalic acid (PTA)
by weight. In order to be classified as a bioplastic, bio-MEG based on sugar cane is required, since bio-PTA has proven to be far too costly. Research is actively underway to investigate more process steps in order to find an economically sustainable way to increase bio content. PEF Belongs to the polyester family and is a 100 per cent biobased alternative to PET. PEF has excellent barrier and thermal properties, which makes the material a suitable replacement for PET as a bottle material. Bio-PTT A member of the polyester family; partially bio-based, exactly like bio-PET. The material makes an excellent fibre for textile manufacturing and in technical products. With requirements for a high surface gloss. Bio-PA Bio-based polyamide is made from castor oil; there are several bio-based variants within the family. PA410, PA610, PA1010, PA1012 and PA11 can be produced completely or partially from castor oil. Each variety has its own spectrum of characteristics. India is the world’s largest producer of castor oil, accounting for 80 per cent of all castor oil produced worldwide. Some of the biodegradable plastics include: PLA Polylactide (or polylactic acid) is usually manufactured through the bacterial fermentation of sugars in corn starch or sugar cane. This bioplastic belongs to the polyester family and is biodegradable/compostable, with a degradation rate that is strongly dependent on the material’s degree of crystallinity. PLA is a highly versatile material and can also be formulated with high-performance qualities that allow it to replace polystyrene, polypropylene and ABS in more intensive applications. It can be foamed and used to replace EPS. The production capacity is expected to increase by 60 per cent by 2023. Advantages of PLA + Good resistance to grease/oils + Good UV stability + Compostable + Easy to glue + Many qualities approved for food grade use + High stiffness + Transparent Disadvantages of PLA - Comparatively high price - Poor resistance to acids and bases - Poor impact resistance - Sensitive to moisture - Sensitive to cleaning agents Starch-based plastics Corn starch is the most common bio-based raw Biodegradability/compostability of renewable raw materials Biodegradability is a characteristic where microorganisms can break down the material into its constituents: carbon dioxide, water and biomass. Compostability means that biodegradation occurs quickly enough for the material to meet the applicable standard. 20 BIOPLASTICS – IT'S A BETTER CHOICE material in starch-based plastics. Starch itself is water-absorbent, which is problematic if you are hoping to create a material with water-repellent properties. However, a variety of modifications have solved this problem. Bioplastics are currently produced with high starch content, with the remaining constituents primarily being biodegradable synthetic polymers such as PBAT or the polyester, polycaprolactone.